Patents by Inventor Gregory L. Walker

Gregory L. Walker has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20100100038
    Abstract: An electronic controller is provided for controlling the evacuation of fluid from one or more fluid reservoirs. The controller includes a plurality of sensors that sense environmental factors and the controller adjusts the evacuation of fluid from the bladder(s) using information gathered by the sensors.
    Type: Application
    Filed: October 15, 2009
    Publication date: April 22, 2010
    Applicant: Symbios Medical Products, LLC
    Inventors: Gregory L. Walker, Geoff Roper
  • Patent number: 7273445
    Abstract: An ocular brachytherapy device, generally comprising a catheter and wire, impregnated with radioactive material, are provided. The wire is formed having a desired treatment shape and size such that it can be placed near an area requiring treatment and effectuate treatment while not affecting adjacent areas. For ease in placement near such areas the wire is preferably formed using materials having properties that permit formation into a desired shape while allowing the wire to be straightened for retraction into the catheter, the shape returning upon removal from the catheter. The wire is preferably impregnated with radioactive material. When the catheter is placed near the area of treatment and the wire is pushed out of the catheter, the wire retakes the desired form and provides a therapeutic radioactive treatment to the area.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: September 25, 2007
    Assignee: Board of Trustees of the University of Illinois
    Inventors: Jose Pulido, Russell J. Hamilton, Gregory L. Walker
  • Patent number: 6652491
    Abstract: A medical device is provided that includes a catheter and a stylet positioned in the catheter. The stylet is configured to guide the catheter through a passage of a patient. The stylet is preferable tubular and made of a shape-memory material that changes shape when heated to bend or turn the catheter.
    Type: Grant
    Filed: May 3, 2001
    Date of Patent: November 25, 2003
    Assignee: Catheter Research, Inc.
    Inventors: Gregory L. Walker, John A. Steen
  • Patent number: 6259938
    Abstract: A monitoring catheter that inserts into the patient's esophagus alone or in combination with an existing catheter, such as a feeding or aspiration tube. The monitoring catheter includes a pair of EMG electrodes on an exposed surface that contact the patient's esophageal wall to measure the activity of the diaphragm and/or a pair of pressure detecting mechanisms that measure the pressures within the patient at separate locations. The electrodes are sized and spaced from one another so as to maximize detection of diaphragm muscle activity while minimizing detection of noise. The pressure detecting mechanisms are sized and spaced apart to measure the patient's esophageal and gastric pressures, for example. If necessary, an attaching mechanism secures at least a portion of the monitoring catheter to the existing catheter so that the monitoring catheter uses the existing catheter as a tracking guide.
    Type: Grant
    Filed: May 13, 1999
    Date of Patent: July 10, 2001
    Assignee: Respironics, Inc.
    Inventors: Jaroslaw Zarychta, Eugene N. Scarberry, Mark H. Sanders, Gregory L. Walker, Mark F. Sauerburger